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Evaluation with mTHPC of early squamous cell carcinomas of the cheek pouch mucosa of Golden Syrian hamsters as a model for clinical PDT of early cancers in the upper aerodigestive tract, the esophagus

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Evolution of DNA ploidy during squamous cell carcinogenesis in the esophagus

Image and flow cytometry was used to study the nuclear DNA content (ploidy) during the squamous cell carcinogenesis in the esophagus. The present retrospective study comprised 26 surgical specimens of squamous cell carcinomas (SCC) in patients who underwen ...

2002

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Early detection and localisation of bronchial cancer remains a challenging task. One approach is to exploit the changes in the autofluorescence characteristics of the bronchial tissue as a diagnostic tool with improved sensitivity. Evidence exists that thi ...

2001

Pharmacokinetics and pharmacodynamics of tetra(m-hydroxyphenyl)chlorin in the hamster cheek pouch tumor model: comparison with clinical measurements

Hubert van den Bergh, Georges Wagnières, Alain Woodtli

The pharmacokinetics (PK) of the photosensitizer tetra(m-hydroxyphenyl)chlorin (mTHPC) was measured by optical fiber-based light-induced fluorescence spectroscopy (LIFS) in the normal and tumoral cheek pouch mucosa of 29 Golden Syrian hamsters with chem. i ...

Elsevier2000

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We have investigated the pharmacokinetics (PK) of Lutetium Texaphyrin (Lu-Tex), a second-generation photosensitizer, in the Syrian hamster cheek pouch early cancer model. Ten male hamsters, five with chem. induced early squamous cell cancer of the left che ...

Elsevier2000

The pharmacokinetics of the photosensitizer used play a key role in the understanding of the mechanism of photodynamic therapy-induced damage. Fluorescence microscopy was used to compare time-dependent biodistribution of tetra(m-hydroxyphenyl)chlorin (mTHP ...

2000

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Cancer, when detected at an early stage, has a very good probability of being eradicated by surgery or radiotherapy. However, less aggressive treatments also tend to provide high rates of cure without the side effects of radical therapy. We report on the r ...

Hindawi Publishing Corporation1999

Optimisation of the formation and distribution of protoporphyrin IX in the urothelium: An in vitro approach

Hubert van den Bergh, Pavel Kucera

PURPOSE: To optimize conditions for photodynamic detection (PDD) and photodynamic therapy (PDT) of bladder carcinoma, urothelial accumulation of protoporphyrin IX (PpIX) and conditions leading to cell photodestruction were studied. MATERIALS AND METHODS: P ...

1999

Clinical photodynamic therapy for superficial cancer in the esophagus and the bronchi: 514 nm compared with 630 nm light irradiation after sensitization with Photofrin II

Hubert van den Bergh, Georges Wagnières

Photodynamic therapy (PDT) for cancer in the esophagus and bronchi with red (630 nm) light may occasionally lead to wall perforation and fistula. Therefore, the clin. use of a less penetrating wavelength (514 nm) was investigated for the curative treatment ...

1998

Interstitial photodynamic therapy with tetra(m-hydroxyphenyl)chlorin: tumor versus striated muscle damage

Hubert van den Bergh, Georges Wagnières, Alain Woodtli

Purpose: The present study was initiated to det. the conditions under which a single photodynamic treatment would induce maximal damage to a tumor with no or at least minimal reversible damage to a normal striated muscle. Methods and Materials: The techniq ...

1998

On the evolution of some endoscopic light delivery systems for photodynamic therapy

Hubert van den Bergh

Progress in photodynamic therapy (PDT) depends on the development of: (1) photosensitizers, (2) optical devices among which are lasers and light delivery systems, and (3) clinical procedure. The light delivery systems which are the focus of this article ar ...

1998